WO2011068358A2 - Procédé et appareil d'émission-réception de données via un canal de données de liaison montante physique sur la base de collisions - Google Patents

Procédé et appareil d'émission-réception de données via un canal de données de liaison montante physique sur la base de collisions Download PDF

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Publication number
WO2011068358A2
WO2011068358A2 PCT/KR2010/008561 KR2010008561W WO2011068358A2 WO 2011068358 A2 WO2011068358 A2 WO 2011068358A2 KR 2010008561 W KR2010008561 W KR 2010008561W WO 2011068358 A2 WO2011068358 A2 WO 2011068358A2
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Prior art keywords
data
channel
contention
transmitted
scheduling request
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PCT/KR2010/008561
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English (en)
Korean (ko)
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WO2011068358A3 (fr
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박규진
한승희
문성호
정재훈
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엘지전자 주식회사
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Priority to US13/512,857 priority Critical patent/US8953535B2/en
Priority claimed from KR1020100121594A external-priority patent/KR20110061507A/ko
Publication of WO2011068358A2 publication Critical patent/WO2011068358A2/fr
Publication of WO2011068358A3 publication Critical patent/WO2011068358A3/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation

Definitions

  • the present invention relates to wireless communication, and more particularly, to a method and apparatus for transmitting and receiving data through a contention-based physical uplink data channel.
  • a 3GPP LTE (3rd Generation Partnership Project Long Term Evolution, hereinafter referred to as 'LTE'), and an LTE-Advanced (hereinafter referred to as 'LTE-A') communication system are outlined.
  • 'LTE' 3rd Generation Partnership Project Long Term Evolution
  • 'LTE-A' LTE-Advanced
  • the cell is set to one of the bandwidth of 1.25MHz, 2.5MHz, 5MHz, 10MHz, 15MHz, 20MHz, etc. for one carrier to provide a downlink / uplink transmission service to multiple terminals. In this case, different cells may be configured to provide different bandwidths.
  • the base station controls data transmission and reception for a plurality of terminals.
  • the base station transmits downlink scheduling information for downlink data and informs the user equipment of time / frequency domain, encoding, data size, and hybrid automatic repeat and reQuest (HARQ) related information.
  • HARQ hybrid automatic repeat and reQuest
  • the base station transmits uplink scheduling information to the corresponding terminal for uplink (UL) data and informs the user of the time / frequency domain, encoding, data size, and hybrid automatic retransmission request related information.
  • An interface for transmitting user traffic or control traffic may be used between base stations.
  • Wireless communication technology has been developed to LTE based on Wideband Code Division Multiple Access (WCDMA), but the demands and expectations of users and operators are continuously increasing.
  • WCDMA Wideband Code Division Multiple Access
  • new technological evolution is required to be competitive in the future. Reduced cost per bit, increased service availability, the use of flexible frequency bands, simple structure and open interface, and adequate power consumption of the terminal are required.
  • LTE-A LTE-A
  • One of the major differences between LTE and LTE-A systems is the difference in system bandwidth and the introduction of repeaters.
  • An object of the present invention is to provide a method for a terminal to transmit data through a contention-based physical uplink data channel.
  • Another object of the present invention is to provide a terminal device for transmitting data through a contention-based physical uplink data channel.
  • Another object of the present invention is to provide a method for a base station to receive data through a contention-based physical uplink data channel.
  • Another object of the present invention is to provide a base station apparatus for receiving data through a contention-based physical uplink data channel.
  • the terminal according to the present invention transmits data through a contention-based physical uplink data channel, the scheduling request through the data and the scheduling request channel through the contention-based physical uplink data channel Transmitting information to the base station simultaneously or sequentially, respectively; And receiving an ACK or NACK signal indicating whether the data has been successfully decoded through a PHICH (Physical Hybrid-ARQ Indicator CHannel) or an UL grant message from the base station.
  • a channel is a channel specifically assigned to the terminal to distinguish it from other terminals.
  • the ACK signal is transmitted through a specific indicator or field in the UL grant message, and the NACK signal indicates a specific indicator or a predefined ACK and NACK feedback region in the UL grant message. Can be sent through.
  • the location of the resource on which the PHICH is transmitted is a cyclic shift value of a demodulation reference signal included in the contention-based physical uplink channel through which the one or more terminals transmit the data, and the physical resource block on which the data is transmitted. It may be determined based on one or more of the indexes.
  • the ACK signal or the NACK signal may be indicated by toggling the specific indicator, and the data may be transmitted through a contention-based uplink data channel frequency-hopping in units of slots.
  • a base station receives data through a contention-based physical uplink data channel, data and scheduling request through the contention-based physical uplink data channel from at least one terminal Receiving scheduling request information through a channel; And decoding data received through the contention-based physical uplink data channel from at least one terminal that has transmitted the scheduling request information, wherein the scheduling request channel is a channel allocated separately for the at least one terminal. to be.
  • an uplink including Physical Hybrid-ARQ Indicator CHannel (HICH) or uplink resource allocation information may further include transmitting an acknowledgment signal (ACK signal) to at least one terminal that has transmitted the scheduling request information through a grant message.
  • ACK signal acknowledgment signal
  • reception negation is transmitted to one or more terminals that have transmitted the scheduling request information through an UL grant message including uplink resource allocation information.
  • NACK signal acknowledgment signal
  • At least one terminal that has transmitted the scheduling request information transmits data transmitted through at least one contention-based physical uplink data channel to the predefined data transmission unit.
  • the method may further include blinding detection for each time.
  • the one contention-based physical uplink channel may include a plurality of data transmission units.
  • the ACK signal is transmitted through a specific indicator or field in the UL grant message
  • the NACK signal is a specific indicator in the UL grant message or a predefined ACK or NACK feedback. Can be transmitted through the region.
  • the location of the resource on which the PHICH is transmitted is a cyclic shift value of a demodulation reference signal included in the contention-based physical uplink channel through which the one or more terminals transmit the data, and the physical resource block on which the data is transmitted. It may be determined based on one or more of the indexes.
  • the ACK signal or the NACK signal is indicated by toggling the specific indicator, and the data may be transmitted through a contention-based uplink data channel frequency-hopping in units of slots.
  • a terminal device for transmitting data through a contention-based physical uplink data channel is scheduled through data and scheduling request channels through the contention-based physical uplink data channel.
  • a transmitter for transmitting the request information to the base station simultaneously or sequentially
  • a receiver for receiving a Physical Hybrid-ARQ Indicator CHannel (PHICH) or UL Grant message from the base station
  • PHICH Physical Hybrid-ARQ Indicator CHannel
  • a processor configured to decode the PHICH or UL grant message to determine whether an ACK signal or a NACK signal is indicated, wherein the scheduling request channel is distinguished from other terminals.
  • a base station apparatus for receiving data through a contention-based physical uplink data channel may request data and scheduling from one or more terminals through the contention-based physical uplink data channel.
  • the base station apparatus when the processor succeeds in decoding the received data, the scheduling request information through an uplink grant (UL grant) message including physical hybrid-ARQ indicator channel (PHICH) or uplink resource allocation information.
  • the transmitter may further include a transmitter that transmits an acknowledgment signal (ACK signal) to one or more terminals that transmit the signal.
  • the base station apparatus transmits the scheduling request information to one or more terminals that transmit the scheduling request information through an UL grant message including uplink resource allocation information.
  • the apparatus may further include a transmitter for transmitting a negative acknowledgment signal (NACK signal).
  • the processor may perform blind detection for each of the predefined data transmission units of data transmitted by one or more terminals that have transmitted the scheduling request information through one or more contention-based physical uplink data channels. Can be.
  • the terminal can efficiently transmit data even before the uplink resource is allocated from the base station.
  • the UE can efficiently perform initial data transmission using the allocation of contention-based physical uplink data channel and related allocation information according to the present invention.
  • FIG. 1 is a block diagram showing the configuration of a base station 105 and a terminal 110 in a wireless communication system 100,
  • FIG. 2 is a diagram illustrating a structure of a radio frame used in a 3GPP LTE system as an example of a mobile communication system
  • 3 is a diagram illustrating the structure of a downlink and uplink subframe in a 3GPP LTE system as an example of a mobile communication system;
  • FIG. 6 is a diagram illustrating an example of a C-PUSCH transmission and a response process performed between a terminal and a base station.
  • a terminal collectively refers to a mobile or fixed user terminal device such as a user equipment (UE), a mobile station (MS), and an advanced mobile station (AMS).
  • the base station collectively refers to any node of the network side that communicates with the terminal such as a Node B, an eNode B, a Base Station, and an Access Point (AP).
  • the repeater may be referred to as a relay node (RN), a relay station (RS), a relay, or the like.
  • a user equipment and a repeater may receive information from a base station through downlink, and the terminal and repeater may also transmit information through uplink.
  • the information transmitted or received by the terminal and the repeater includes data and various control information, and various physical channels exist according to the type and purpose of the information transmitted or received by the terminal and the repeater.
  • FIG. 1 is a block diagram showing the configuration of a base station 105 and a terminal 110 in a wireless communication system 100.
  • the wireless communication system 200 may include one or more base stations and / or one or more terminals. .
  • the base station 105 includes a transmit (Tx) data processor 115, a symbol modulator 120, a transmitter 125, a transmit / receive antenna 130, a processor 180, a memory 185, and a receiver ( 190, a symbol demodulator 195, and a receive data processor 297.
  • the terminal 110 transmits (Tx) the data processor 165, the symbol modulator 170, the transmitter 175, the transmit / receive antenna 135, the processor 155, the memory 160, the receiver 140, and the symbol. It may include a demodulator 155 and a receive data processor 150.
  • the base station 105 and the terminal 110 are provided with a plurality of antennas. Accordingly, the base station 105 and the terminal 110 according to the present invention support a multiple input multiple output (MIMO) system.
  • the base station 105 according to the present invention may support both a single user-MIMO (SU-MIMO) and a multi user-MIMO (MU-MIMO) scheme.
  • SU-MIMO single user-MIMO
  • MU-MIMO multi user-MIMO
  • the transmit data processor 115 receives the traffic data, formats the received traffic data, codes it, interleaves and modulates (or symbol maps) the coded traffic data, and modulates the symbols ("data"). Symbols ").
  • the symbol modulator 120 receives and processes these data symbols and pilot symbols to provide a stream of symbols.
  • the symbol modulator 120 multiplexes the data and pilot symbols and sends it to the transmitter 125.
  • each transmission symbol may be a data symbol, a pilot symbol, or a null signal value.
  • pilot symbols may be sent continuously.
  • the pilot symbols may be frequency division multiplexing (FDM), orthogonal frequency division multiplexing (OFDM), time division multiplexing (TDM), or code division multiplexing (CDM) symbols.
  • Transmitter 125 receives the stream of symbols and converts it into one or more analog signals and further adjusts (eg, amplifies, filters, and frequency upconverts) the analog signals to provide a wireless channel. Generates a downlink signal suitable for transmission through the downlink signal, which is then transmitted to the terminal through the antenna 130.
  • the antenna 135 receives the downlink signal from the base station and provides the received signal to the receiver 140.
  • Receiver 140 adjusts (eg, filters, amplifies, and frequency downconverts) the received signal, and digitizes the adjusted signal to obtain samples.
  • the symbol demodulator 145 demodulates the received pilot symbols and provides them to the processor 155 for channel estimation.
  • the symbol demodulator 145 also receives a frequency response estimate for the downlink from the processor 155 and performs data demodulation on the received data symbols to obtain a data symbol estimate (which is an estimate of the transmitted data symbols). Obtain and provide data symbol estimates to a receive (Rx) data processor 150. Receive data processor 150 demodulates (ie, symbol de-maps), deinterleaves, and decodes the data symbol estimates to recover the transmitted traffic data.
  • the processing by symbol demodulator 145 and receiving data processor 150 is complementary to the processing by symbol modulator 120 and transmitting data processor 115 at base station 105, respectively.
  • the terminal 110 is on the uplink, and the transmit data processor 165 processes the traffic data to provide data symbols.
  • the symbol modulator 170 may receive and multiplex data symbols, perform modulation, and provide a stream of symbols to the transmitter 175.
  • the transmitter 175 receives and processes a stream of symbols to generate an uplink signal, which is transmitted to the base station 105 via the antenna 135.
  • an uplink signal is received from the terminal 110 through the antenna 130, and the receiver 190 processes the received uplink signal to obtain samples.
  • the symbol demodulator 195 then processes these samples to provide received pilot symbols and data symbol estimates for the uplink.
  • the received data processor 297 processes the data symbol estimates to recover the traffic data transmitted from the terminal 110.
  • Processors 155 and 180 of the terminal 110 and the base station 105 respectively instruct (eg, control, coordinate, manage, etc.) operations at the terminal 110 and the base station 105, respectively.
  • Respective processors 155 and 180 may be connected to memory units 160 and 185 that store program codes and data.
  • the memory 160, 185 is coupled to the processor 180 to store the operating system, applications, and general files.
  • the processors 155 and 180 may also be referred to as controllers, microcontrollers, microprocessors, microcomputers, or the like.
  • the processors 155 and 180 may be implemented by hardware or firmware, software, or a combination thereof.
  • ASICs application specific integrated circuits
  • DSPs digital signal processors
  • DSPDs digital signal processing devices
  • PLDs programmable logic devices
  • FPGAs Field programmable gate arrays
  • the firmware or software may be configured to include a module, a procedure, or a function for performing the functions or operations of the present invention, and to perform the present invention.
  • the firmware or software configured to be may be provided in the processors 155 and 180 or stored in the memory 160 and 185 to be driven by the processors 155 and 180.
  • the layers of the air interface protocol between the terminal and the base station between the wireless communication system (network) are based on the first three layers (L1), the second layer (based on the lower three layers of the open system interconnection (OSI) model well known in the communication system). L2), and the third layer L3.
  • the physical layer belongs to the first layer and provides an information transmission service through a physical channel.
  • a Radio Resource Control (RRC) layer belongs to the third layer and provides control radio resources between the UE and the network.
  • the terminal and the base station may exchange RRC messages through the wireless communication network and the RRC layer.
  • FIG. 2 is a diagram illustrating a structure of a radio frame used in a 3GPP LTE system as an example of a mobile communication system.
  • one radio frame has a length of 10 ms (327200 Ts) and consists of 10 equally sized subframes.
  • Each subframe has a length of 1 ms and consists of two slots.
  • Each slot has a length of 0.5 ms (15360 Ts).
  • the slot includes a plurality of OFDM symbols or SC-FDMA symbols in the time domain and a plurality of resource blocks in the frequency domain.
  • one resource block includes 12 subcarriers x 7 (6) OFDM symbols or SC-FDMA (Single Carrier-Frequency Division Multiple Access) symbols.
  • Transmission time interval which is a unit time for transmitting data, may be determined in units of one or more subframes.
  • the structure of the above-described radio frame is only an example, and the number of subframes included in the radio frame or the number of slots included in the subframe, the number of OFDM symbols or SC-FDMA symbols included in the slot may be variously changed. have.
  • 3 is a diagram illustrating a structure of downlink and uplink subframes of a 3GPP LTE system as an example of a mobile communication system.
  • one downlink subframe includes two slots in the time domain. Up to three OFDM symbols of the first slot in the downlink subframe are control regions to which control channels are allocated, and the remaining OFDM symbols are data regions to which a Physical Downlink Shared Channel (PDSCH) is allocated.
  • PDSCH Physical Downlink Shared Channel
  • Downlink control channels used in 3GPP LTE systems include a PCFICH (Physical Control Format Indicator Channel), PDCCH (Physical Downlink Control Channel), PHICH (Physical Hybrid-ARQ Indicator Channel).
  • the PCFICH transmitted in the first OFDM symbol of the subframe carries information about the number of OFDM symbols (that is, the size of the control region) used for transmission of control channels in the subframe.
  • Control information transmitted through the PDCCH is called downlink control information (DCI).
  • DCI indicates uplink resource allocation information, downlink resource allocation information, and uplink transmission power control command for arbitrary UE groups.
  • the PHICH carries an ACK (Acknowledgement) / NACK (Not-Acknowledgement) signal for an uplink HARQ (Hybrid Automatic Repeat Request). That is, the ACK / NACK signal for the uplink data transmitted by the terminal is transmitted on the PHICH.
  • ACK Acknowledgement
  • NACK Not-Acknowledgement
  • the base station sets a resource allocation and transmission format of the PDSCH (also referred to as a DL grant), a resource allocation information of the PUSCH (also referred to as a UL grant) through a PDCCH, a set of transmission power control commands for an arbitrary terminal and individual terminals in a group. And activation of Voice over Internet Protocol (VoIP).
  • a plurality of PDCCHs may be transmitted in the control region, and the terminal may monitor the plurality of PDCCHs.
  • the PDCCH consists of an aggregation of one or several consecutive Control Channel Elements (CCEs).
  • the PDCCH composed of one or several consecutive CCEs may be transmitted through the control region after subblock interleaving.
  • CCE is a logical allocation unit used to provide a PDCCH with a coding rate according to a state of a radio channel.
  • the CCE corresponds to a plurality of resource element groups.
  • the format of the PDCCH and the number of possible bits of the PDCCH are determined by the correlation between the number of CCEs and the coding rate provided by the CCEs.
  • DCI Downlink control information
  • DCI format 0 indicates uplink resource allocation information
  • DCI formats 1 to 2 indicate downlink resource allocation information
  • DCI formats 3 and 3A indicate uplink transmit power control (TPC) commands for arbitrary UE groups. .
  • the base station may transmit scheduling assignment information and other control information through the PDCCH.
  • the physical control channel may be transmitted in one aggregation or a plurality of continuous control channel elements (CCEs).
  • CCEs continuous control channel elements
  • One CCE includes nine Resource Element Groups (REGs).
  • the number of RBGs that are not allocated to the Physical Control Format Indicator CHhannel (PCFICH) or the Physical Hybrid Automatic Repeat Request Indicator Channel (PHICH) is N REG .
  • the available CCEs in the system are from 0 to N CCE -1 (where to be).
  • the PDCCH supports multiple formats as shown in Table 2 below.
  • the base station may determine the PDCCH format according to how many areas, such as control information, to send.
  • the UE may reduce overhead by reading control information in units of CCE.
  • an uplink subframe may be divided into a control region and a data region in the frequency domain.
  • the control region is allocated to a physical uplink control channel (PUCCH) that carries uplink control information.
  • the data area is allocated to a Physical Uplink Shared CHannel (PUSCH) for carrying user data.
  • PUCCH Physical Uplink Shared CHannel
  • PUSCH Physical Uplink Shared CHannel
  • PUCCH for one UE is allocated to an RB pair in one subframe. RBs belonging to the RB pair occupy different subcarriers in each of two slots. The RB pair assigned to the PUCCH is frequency hopped at the slot boundary.
  • FIG. 4 illustrates a downlink time-frequency resource grid structure used in the present invention.
  • OFDM orthogonal frequency division multiplexing
  • the number of OFDM symbols included in one slot may vary depending on the length of a cyclic prefix (CP) and the spacing of subcarriers. In case of multi-antenna transmission, one resource grid may be defined per one antenna port.
  • CP cyclic prefix
  • Each element in the resource grid for each antenna port is called a resource element (RE) and is uniquely identified by an index pair (k, l) in the slot.
  • k is the index in the frequency domain
  • l is the index in the time domain and k is 0, ...
  • Has a value of -1 and l is 0, ..., It has any one of -1.
  • the resource block shown in FIG. 4 is used to describe a mapping relationship between certain physical channels and resource elements.
  • the RB may be divided into a physical resource block (PRB) and a virtual resource block (VRB).
  • PRB physical resource block
  • VRB virtual resource block
  • the one PRB is a time domain Contiguous OFDM symbols and frequency domain It is defined as two consecutive subcarriers. here and May be a predetermined value. E.g and Can be given as Table 3 below. So one PRB ⁇ It consists of four resource elements.
  • One PRB may correspond to one slot in the time domain and 180 kHz in the frequency domain, but is not limited thereto.
  • PRB is at 0 in the frequency domain It has a value up to -1.
  • the size of the VRB is equal to the size of the PRB.
  • the VRB may be defined by being divided into a localized VRB (LVRB) and a distributed VRB (DVRB). For each type of VRB, a pair of VRBs in two slots in one subframe are assigned together a single VRB number n VRBs .
  • the VRB may have the same size as the PRB.
  • Two types of VRBs are defined, the first type being a localized VRB (LVRB) and the second type being a distributed VRB (DVRB).
  • LVRB localized VRB
  • DVRB distributed VRB
  • a pair of VRBs are allocated over two slots of one subframe with a single VRB index (hereinafter may also be referred to as VRB number).
  • VRB number belonging to the first slot of the two slots constituting one subframe VRBs from 0 each Is assigned an index of any one of -1, and belongs to the second one of the two slots VRBs likewise start with 0
  • the index of any one of -1 is allocated.
  • the base station determines the PDCCH format according to the downlink control information (DCI) to be sent to the terminal, and attaches a CRC (Cyclic Redundancy Check) to the control information.
  • the CRC is masked with a unique identifier (referred to as RNTI (Radio Network Temporary Identifier)) according to the owner or purpose of the PDCCH.
  • RNTI Radio Network Temporary Identifier
  • the PDCCH is for a specific terminal, a unique identifier of the terminal, for example, a C-RNTI (Cell-RNTI) may be masked to the CRC.
  • a paging indication identifier for example, P-RNTI (P-RNTI) may be masked to the CRC.
  • P-RNTI P-RNTI
  • SI-RNTI system information-RNTI
  • RA-RNTI random access-RNTI
  • the PDCCH When the C-RNTI is used, the PDCCH carries control information for a specific specific terminal, and when another RNTI is used, the PDCCH carries common control information received by all or a plurality of terminals in a cell.
  • the base station performs channel coding on the DCI to which the CRC is added to generate coded data.
  • the base station performs rate matching according to the number of CCEs allocated to the PDCCH and R-PDCCH formats.
  • the base station then modulates the encoded data to generate modulation symbols.
  • the base station maps modulation symbols to physical resource elements.
  • the base station transmits resource allocation information (also referred to as UL grant) of the PUSCH to the terminal through the PDCCH. Then, the terminal may transmit the uplink data to the base station through the PUSCH scheduled from the base station.
  • the scheduled PUSCH corresponds to a contention-free uplink data channel.
  • the terminal needs to transmit data through the contention-based physical uplink data channel before receiving the scheduling for uplink data transmission from the base station. Therefore, hereinafter, a contention-based uplink data transmission scheme of an LTE-A terminal will be described.
  • a new channel for contention-based uplink data transmission is defined and referred to as Contention based Physical Uplink Shared CHannel (C-PUSCH, hereinafter referred to as 'C-PUSCH').
  • C-PUSCH Contention based Physical Uplink Shared CHannel
  • 'C-PUSCH' contention-based Physical Uplink data channel
  • the contention-based physical uplink data channel may be referred to by other names as well as the C-PUSCH.
  • a base station defines a method of allocating a C-PUSCH to a terminal, a method of transmitting a C-PUSCH of the terminal, and a procedure in the base station and the terminal.
  • the base station may allocate a specific area on the frequency and time axis and inform the terminal of this.
  • the base station may transmit the corresponding C-PUSCH configuration information to each terminal through cell-specific or UE-specific RRC signaling.
  • the base station may allocate the C-PUSCH in units of physical resource blocks (PRBs) on the frequency axis.
  • PRB allocation for the C-PUSCH of the base station may be a bitmap (bitmap) method.
  • the base station allocates 1 bit per PRB and informs the UE whether to allocate C-PUSCH channels for all uplink PRB indexes as a bitmap indication, or provides two or more PRBs in one resource block.
  • RBG Resource Block Group
  • the number of PRBs constituting one RBG is semi-statically allocated by the base station through cell-specific RRC signaling when C-PUSCH is set or implied according to an uplink bandwidth.
  • the UE may know the number of PRBs constituting one RBG.
  • the base station continuously allocates PRBs for the C-PUSCH.
  • the base station may inform the UE of the PRB index corresponding to the start point of the C-PUSCH and the frequency size of the C-PUSCH (for example, the number of PRBs), or inform the UE of the start point of the PRB index and the end point of the PRB index. have.
  • the base station may allow the base station to allocate the C-PUSCH to a band edge except for the PUCCH in one UL component carrier.
  • the C-PUSCH when allocated according to the presence or absence of the PUCCH of the corresponding UL component carrier, it may be allocated as shown in FIG. 5.
  • FIG. 5 is a diagram conceptually illustrating an example of allocating a C-PUSCH.
  • PUCCHs 510 and 520, C-PUSCHs 530 and 540, and PUSCH 530 may be allocated to the entire system band of one uplink component carrier.
  • the PUCCHs 510 and 520 may be allocated to both edge regions of the entire system band.
  • the C-PUSCHs 530 and 540 may be newly defined and allocated to a new channel.
  • the base station may signal only the frequency size (eg, the number of PRBs) of the C-PUSCH to the terminal.
  • PUCCHs 560 and 565, C-PUSCHs 570, 575, 580 and 590, and PUSCH 595 may be allocated to the entire system of one uplink component carrier.
  • the base station may support slot hopping for C-PUSCH transmission of the terminal. That is, data corresponding to the C-PUSCHs 570, 575, 580, and 590 may be transmitted in the form of frequency hopping in units of slots as shown in FIG. 5B.
  • the PUSCH slot hopping structure may be ignored and slot hopping may be performed along the slot hopping structure of the C-PUSCH.
  • the UE may transmit data to the base station through the C-PUSCH using the slot hopping scheme in a pair of the C-PUSCHs 570 and 590.
  • the base station may inform the terminal of the above-mentioned allocation information on the cell-commonly configured frequency axis of the C-PUSCH through cell-specific RRC signaling, or the frequency axis specifically configured for each terminal of the C-PUSCH.
  • the allocation information in may be informed through UE-specific RRC signaling.
  • the base station may inform the UE of the C-PUSCH allocation information on the time axis together with the C-PUSCH allocation information on the frequency axis.
  • the base station may allocate a C-PUSCH to the UE based on a table created by creating a C-PUSCH configuration table similarly to the PRACH configuration scheme.
  • the base station may signal the period of the C-PUSCH directly to the terminal.
  • the base station may set UE-specific interval information on the time axis of the C-PUSCH, and in this case, the base station may configure the time axis of the C-PUSCH through UE-specific RRC signaling for each UE. It can tell the section information in.
  • the base station may set a cell-common value and inform the terminal of the section information on the time axis of the C-PUSCH through cell-specific RRC signaling.
  • the C-PUSCH configuration may be configured in a two-step manner by using C-PUSCH region setting information on the frequency axis and C-PUSCH interval setting information on the time axis.
  • the base station may transmit the C-PUSCH region information on the frequency axis and the C-PUSCH interval information on the time axis together to the terminal through the same signaling or to the terminal through different signaling.
  • the base station transmits cell common C-PUSCH region information on the frequency axis to the terminal through cell-specific RRC signaling, and for each terminal.
  • the C-PUSCH interval information on the specifically configured time axis may be transmitted to the terminal through UE-specific RRC signaling.
  • the base station transmits C-PUSCH region information that is specifically set for each terminal on the frequency axis to the terminal through UE-specific RRC signaling, and on a cell common time axis.
  • the C-PUSCH interval information may be transmitted to the terminal through cell-common RRC signaling.
  • the base station groups the terminals in the cell to have a common C-PUSCH configuration in the UE group, but group-specific C-PUSCH configuration having different C-PUSCH configurations for each group You can take
  • the base station may transmit the UE grouping information to the corresponding group through UE-specific RRC signaling or may indicate a group to which each UE belongs to each UE.
  • the terminal may transmit data to the base station through the C-PUSCH.
  • the terminal may transmit data to the base station through the C-PUSCH semi-statically set by the base station.
  • the UE may arbitrarily select and transmit one of the C-PUSCH transmission basic units constituting the nearest (fastest time) C-PUSCH channel.
  • the C-PUSCH transmission basic unit of the UE may be defined as a C-PUSCH transmission opportunity.
  • One C-PUSCH channel may be configured with one or more C-PUSCH transmission opportunities.
  • the UE selects one of the C-PUSCH transmission opportunities (opportunity) of the C-PUSCH transmission opportunity (opportunity) constituting the C-PUSCH channel during C-PUSCH transmission, and through the selected C-PUSCH transmission opportunity (opportunity) Data can be sent to the base station.
  • the size of the C-PUSCH transmission opportunity can be determined as follows.
  • one PRB (Physical Resource Block) on the frequency axis and one slot (0.5ms) on the time axis may be set as a unit C-PUSCH transmission opportunity.
  • the number of C-PUSCH channels of one subframe is N in the first slot and the second slot, respectively, when the size (ie, the number of PRBs) on the frequency axis is N. Since it includes a total of 2N C-PUSCH transmission opportunity (opportunity) can be configured.
  • one PRB on the frequency axis and one subframe (1 ms) on the time axis may be set as a unit C-PUSCH transmission opportunity.
  • the C-PUSCH channel of one subframe may be configured with a total of N C-PUSCH transmission opportunities when the size (ie, the number of PRBs) on the frequency axis is N.
  • the UE when an uplink data packet (ie, a C-PUSCH transmission packet) comes down from an upper end, the UE configures C-PUSCH channels allocated for a predetermined time interval (for example, 2 ms or 4 ms).
  • a predetermined time interval for example, 2 ms or 4 ms.
  • One of all C-PUSCH transmission opportunities may be arbitrarily selected and transmitted. That is, by introducing a window concept for C-PUSCH transmission, the UE may select and transmit one of C-PUSCH transmission opportunities of all C-PUSCH channels belonging to the corresponding window.
  • the UE since the corresponding C-PUSCH transmission window size is fixed implicitly, the UE may implicitly know, and the UE may receive UE-specific signaling or cell-specific RRC (Radio) from the base station.
  • Radio Radio
  • Resource Control can be used to know the corresponding C-PUSCH transmission window size. Or, if the C-PUSCH transmission packet comes down from the upper end, the terminal randomly selects one of the C-PUSCH transmission opportunity (opportunity) constituting the C-PUSCH channel after a random back-off (random backoff), the selected C- Data may be transmitted to the base station through the PUSCH transmission opportunity.
  • FIG. 6 is a diagram illustrating an example of a C-PUSCH transmission and a response process performed between a terminal and a base station.
  • the UE may transmit scheduling request information through a scheduling request channel along with C-PUSCH transmission. To do this, one of the following two options can be applied.
  • the terminal may simultaneously transmit a scheduling request (SR) and a C-PUSCH to the base station through the same subframe (S610). Then, the base station may perform a decoding operation for receiving the C-PUSCH information transmitted through the corresponding C-PUSCH channel by the terminal transmitting the scheduling request information through the scheduling request (SR) channel (S620).
  • the base station is a block for searching whether the data transmitted by the one or more terminals that have transmitted the scheduling request information through one or more contention-based physical uplink data channels for each of the predefined data transmission units (ie, C-PUSCH transmission opportunities). Blinding detection may be performed (S620).
  • the scheduling request channel through which the terminal transmits scheduling request information may be a channel specifically allocated to each terminal.
  • the terminal when an uplink data packet arrives from an upper end, the terminal first transmits a scheduling request signal to the base station through a scheduling request channel, and then the terminal transmits a subsequent K th subframe (
  • data C-PUSCH signal
  • K may be transmitted to a base station through a C-PUSCH channel within an integer of K ⁇ 1.
  • the K value may have a UE-specific value. In this case, the base station may inform the UE through UE-specific RRC signaling.
  • the K value may be determined according to the period of the C-PUSCH. For example, the K value may be set to have the same value as the C-PUSCH period.
  • the base station may receive scheduling request information from the one or more terminals through the contention-based physical uplink data channel through the data and the scheduling request channel simultaneously or sequentially (S610). After receiving the scheduling request signal from the terminal, the base station transmits the scheduling request signal according to the aforementioned related C-PUSCH transmission scheme for every C-PUSCH transmission opportunity (opportunity) in which the terminal can transmit the corresponding C-PUSCH signal. Blind detection may be performed (S620).
  • a C-PUSCH message eg, an uplink data packet through the C-PUSCH
  • the base station has C-.
  • PHICH channel mapped implicitly or according to a pre-defined rule according to a PRB index in which PUSCH transmission is performed and a cyclic shift value of a demodulation reference signal (for example, a DeModulation Reference Signal (DM RS)) of a UE
  • DM RS DeModulation Reference Signal
  • the base station may omit the ACK / NACK feedback through the PHICH and implicitly inform the terminal of the ACK signal by toggling a new data indicator region (or field) of an uplink grant.
  • the new data indicator may be, for example, 1 bit in size and may indicate an ACK signal by being toggled.
  • the PHICH is a channel through which the base station transmits HARQ ACK / NACK in response to the uplink transmission of the terminal.
  • Multiple PHICHs may be mapped to the same resource element (RE) by a code division multiplexing (CDM) scheme.
  • the base station may multiplex HARQ ACK / NACK in response to data transmission through the C-PUSCH of a plurality of terminals by a code division multiplexing scheme and transmit the same through the PHICH.
  • the base station when the base station does not successfully receive (decode) the C-PUSCH transmission to the corresponding terminal that has transmitted the scheduling request signal (S630), the base station transmits a NACK signal for the C-PUSCH transmission data to the corresponding terminal through a UL grant. It may be transmitted (S640).
  • the base station may implicitly C- through the C-PUSCH ACK / NACK feedback area (or field) newly defined in the UL grant message or through the new data indicator area (or field) in the UL grant.
  • the ACK / NACK feedback for the PUSCH transmission may inform the UE of the NACK signal.
  • the UE may determine whether the C-PUSCH transmission is successful based on a signal received through the PHICH, a new data indicator region included in the UL grant, or a signal received through the newly defined C-PUSCH ACK / NACK feedback region. (S650). If the UE successfully transmits the C-PUSCH, the UE may transmit new data to the base station through the allocated uplink resource resource. If the C-PUSCH transmission fails, the UE retransmits the C-PUSCH data to the base station through the allocated uplink resource. S660).
  • the base station Before the UE starts C-PUSCH transmission, the base station allocates a cyclic shift value of a demodulation reference signal (for example, DM RS) to the UE, thereby allowing UE-specific RRC for each UE. It can be transmitted through signaling. Or, if the base station defines a rule that implicitly maps the cyclic shift value according to the C-RNTI of the terminal and transmits it to the terminal, the terminal can know the implicitly mapped cyclic shift value.
  • the UE may perform C-PUSCH transmission by using a cyclic shift value of a demodulation reference signal allocated through separate signaling from a base station or by using an implicitly known cyclic shift value.
  • the base station may newly define a UE-specific C-PUSCH configuration message for the C-PUSCH transmission of the terminal.
  • Information with a value or group-specific information can be included and transmitted.
  • an RRC message for transmission of information having a UE-specific value among the information mentioned in the various C-PUSCH configuration information may be defined.
  • the base station determines information having a UE-specific value among the C-PUSCH configuration information (eg, a demodulation reference signal cyclic shift value, a C-PUSCH transmission window size, and the K value, where K is The number of subframe intervals from the subframe in which the UE transmits the scheduling request information to the subframe in which data is transmitted through the C-PUSCH) may be collected and lowered for each UE.
  • the C-PUSCH configuration information eg, a demodulation reference signal cyclic shift value, a C-PUSCH transmission window size, and the K value, where K is The number of subframe intervals from the subframe in which the UE transmits the scheduling request information to the subframe in which data is transmitted through the C-PUSCH
  • each component or feature is to be considered optional unless stated otherwise.
  • Each component or feature may be embodied in a form that is not combined with other components or features. It is also possible to combine some of the components and / or features to form an embodiment of the invention.
  • the order of the operations described in the embodiments of the present invention may be changed. Some components or features of one embodiment may be included in another embodiment or may be replaced with corresponding components or features of another embodiment. It is obvious that the claims may be combined to form an embodiment by combining claims that do not have an explicit citation relationship in the claims or as new claims by post-application correction.
  • a method for transmitting and receiving data through a contention-based physical uplink data channel and an apparatus therefor are available industrially in a wireless communication scheme such as 3GPP LTE-A, IEEE 802 system, and the like.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

La présente invention concerne un procédé et un appareil pour émettre et recevoir des données via un canal de données de liaison montante physique sur la base de collisions. Un appareil terminal, qui émet des données via un canal de données de liaison montante physique sur la base de collisions, comprend : un émetteur qui émet à une station de base simultanément ou consécutivement des données via un canal de données de liaison montante physique sur la base de collisions et des informations de demande d'ordonnancement via un canal de demande d'ordonnancement ; un récepteur qui reçoit de la station de base un canal d'indicateur ARQ hybride physique (PHICH) ou un message d'allocation de liaison montante (UL) ; et un processeur qui décode le canal d'indicateur ARQ hybride physique (PHICH) ou le message d'allocation de liaison montante (UL) afin de déterminer si un signal d'accusé de réception positif (ACK) ou négatif (NACK) est indiqué. Selon l'invention, le canal de demande d'ordonnancement peut être un canal spécifique alloué à l'appareil terminal afin de différencier le terminal d'autres appareils terminaux.
PCT/KR2010/008561 2009-12-01 2010-12-01 Procédé et appareil d'émission-réception de données via un canal de données de liaison montante physique sur la base de collisions WO2011068358A2 (fr)

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